[Al Skierkiewicz]

As a caveat, inspectors need to identify that the cylinder is indeed on the allowable list...
<R89> In addition to the pneumatic cylinders provided in the Kit Of Parts and the “free” pneumatic cylinders available for order through the Free Pneumatic Components Order Form,additional air cylinders or rotary actuators may be used. All cylinders, regardless of source, must be identical to those listed on the Free Pneumatic Components Order Form (e.g. samepart numbers). Any additional air cylinders must source from Bimba or Parker Hannifin, or be recovered from prior year FIRST Kit Of Parts.

See also R90 and

<R92> Pneumatic components supplied in the Kit Of Parts (compressor, regulators, pressure switches, cylinders, valves, fittings, tubing, etc.) can not be modified except as follows:
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Consider pneumatic components sacred. They must remain in “out of the shipping box” condition.
I think that says it all.